/* RESET & BASE */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-body);
  color: var(--color-text);
  background-color: var(--color-bg);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  transition: background-color var(--transition-base), color var(--transition-base);
}

a {
  color: inherit;
  text-decoration: none;
}

img, svg {
  display: block;
  max-width: 100%;
  height: auto;
}

ul, ol {
  list-style: none;
}

button {
  background: none;
  border: none;
  cursor: pointer;
  font-family: inherit;
  color: inherit;
}

/* UTILITIES */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

.section {
  padding: var(--space-section) 0;
}

.section-header {
  text-align: center;
  margin-bottom: var(--space-2xl);
}

.section-header h2 {
  font-family: var(--font-heading);
  font-size: var(--fs-2xl);
  font-weight: var(--fw-regular);
  color: var(--color-text);
  margin-bottom: var(--space-sm);
}

.section-header p {
  color: var(--color-text-muted);
  font-size: var(--fs-md);
}

.grid-2, .grid-3, .grid-4 {
  display: grid;
  gap: var(--space-xl);
}
.grid-2 { grid-template-columns: repeat(1, 1fr); }
.grid-3 { grid-template-columns: repeat(1, 1fr); }
.grid-4 { grid-template-columns: repeat(1, 1fr); }

@media (min-width: 768px) {
  .grid-2 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 992px) {
  .grid-3 { grid-template-columns: repeat(3, 1fr); }
  .grid-4 { grid-template-columns: repeat(4, 1fr); }
}

/* ANNOUNCEMENT BAR */
.announcement-bar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--announcement-height);
  background-color: var(--color-announcement);
  color: var(--color-announcement-text);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1100;
  font-size: 0.75rem;
  letter-spacing: 1px;
  text-transform: uppercase;
  font-weight: var(--fw-medium);
}

/* HEADER */
.site-header {
  position: fixed;
  top: var(--announcement-height);
  left: 0;
  width: 100%;
  height: var(--header-height);
  background-color: var(--color-header-bg);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border);
  z-index: 1000;
  transition: transform var(--transition-base), background-color var(--transition-base);
}

.site-header.scrolled {
  box-shadow: var(--shadow-sm);
}

.header-inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: relative;
}

.main-nav {
  display: none;
}
@media (min-width: 992px) {
  .main-nav {
    display: flex;
    flex: 1;
  }
}

.nav-list {
  display: flex;
  gap: var(--space-lg);
}

.nav-link {
  font-family: var(--font-body);
  font-size: var(--fs-xs);
  text-transform: uppercase;
  letter-spacing: 2px;
  font-weight: var(--fw-medium);
  color: var(--color-text);
  transition: color var(--transition-fast);
  padding: var(--space-xs) 0;
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 1px;
  background-color: var(--color-text);
  transition: width var(--transition-base);
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-accent);
}

.header-logo {
  flex: 1;
  text-align: center;
  font-family: var(--font-heading);
  font-size: var(--fs-xl);
  font-weight: var(--fw-regular);
  letter-spacing: 1px;
  display: flex;
  justify-content: center;
  align-items: center;
}
@media (min-width: 992px) {
  .header-logo {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
  }
}

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  flex: 1;
  justify-content: flex-end;
}

.theme-toggle,
.cart-toggle,
.menu-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  color: var(--color-text);
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.theme-toggle:hover,
.cart-toggle:hover {
  background-color: var(--color-bg-alt);
}

.menu-toggle {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
@media (min-width: 992px) {
  .menu-toggle {
    display: none;
  }
}
.menu-toggle span {
  display: block;
  width: 20px;
  height: 1px;
  background-color: currentColor;
  transition: var(--transition-base);
}

/* THEME ICONS */
.icon-moon, .icon-sun {
  width: 20px;
  height: 20px;
  fill: currentColor;
}
.icon-sun { display: none; }
[data-theme="dark"] .icon-sun { display: block; }
[data-theme="dark"] .icon-moon { display: none; }

/* MAIN CONTENT OFFSET */
main {
  padding-top: calc(var(--header-height) + var(--announcement-height));
  min-height: 100vh;
}

/* FOOTER */
.site-footer {
  background-color: var(--color-bg-alt);
  padding: var(--space-3xl) 0 var(--space-xl);
  border-top: 1px solid var(--color-border);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-2xl);
  margin-bottom: var(--space-3xl);
}
@media (min-width: 768px) {
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (min-width: 992px) {
  .footer-grid {
    grid-template-columns: 2fr 1fr 1fr 1fr;
  }
}

.footer-heading {
  font-size: var(--fs-xs);
  text-transform: uppercase;
  letter-spacing: 2px;
  font-weight: var(--fw-bold);
  margin-bottom: var(--space-lg);
  color: var(--color-text);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.footer-links a {
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: var(--color-accent);
}

.footer-tagline {
  font-family: var(--font-heading);
  font-size: var(--fs-lg);
  font-style: italic;
  margin-bottom: var(--space-md);
  color: var(--color-text);
}

.social-links {
  display: flex;
  gap: var(--space-md);
}

.social-link {
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
}

.social-link:hover {
  color: var(--color-accent);
}

.footer-bottom {
  padding-top: var(--space-xl);
  border-top: 1px solid var(--color-border);
  text-align: center;
  font-size: var(--fs-xs);
  color: var(--color-text-muted);
}

/* ANIMATIONS */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}